摘要
压实换填粘性土料是南水北调中线一期工程对总干渠膨胀岩试验段(潞王坟段)渠坡处理方式之一,对其防渗性要求较高。采用GUELPH现场入渗仪在碾压现场开展了原位渗透试验研究。结果表明:采用18 t振动平碾,对不同铺土厚度进行碾压试验,铺土厚度35 cm的碾压效果较好,碾压至12遍时,压实度可达99.4%,渗透系数为4.90×10-6cm/s;采用不同的碾压机械,对铺土厚35 cm,以20 t振动凸块碾的碾压效果较好,碾压10遍,压实度可达97.2%,渗透系数为4.89×10-6cm/s。
Compact replacing cohesive soil is one of the methods for treatment of canal slope in swelling rock test section of the main canal （ Luwangfen Section） in the first stage of the central line of South-to-North water diversion project, which has a higher requirement for permeability resistance. In-situ permeability test is carried out in rolling site with GUELPH infiltration meter. The result indicates that with 1St vibratory smooth- wheel roller, for different paving thickness, 35cm has a better compaction; its compactness can reach 99.4% and permeability coefficient is 4. 90 ×10^-6cm/s at the 12^th roiling. With different rolling machines, for paving thickness of 35cm, 20t vibratory sheepfoot roller receives better compaction effect; its compactness can reach 97.2% and permeability coefficient is 4. 89 ×10^-6cm/s at the 10^th rolling.
出处
《路基工程》
2010年第2期40-43,共4页
Subgrade Engineering
基金
国家"十一五"科技支撑计划(2006BAB04A10)
长江科学院博士科研启动金(YJJ0809)
关键词
换填粘性土料
压实
原位渗透试验
replacing cohesive soil
compaction
in-situ permeability test
作者简介
谭峰屹（1979-），男，湖北黄石人。工程师，博士，主要从事岩土工程的加固理论与实施技术研究方面的工作。E—mail：fly2003@126．com。
